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Finding the Fourth Proportional to 268,045.68, 402,068.76 and 81,057.36

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Solution

The fourth proportional to 268,045.68, 402,068.76 and 81,057.36 is: 121,586.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,045.68 : 402,068.76 = 81,057.36 : x
  2. Step 2: Convert to fraction form
    268,045.68/402,068.76 = 81,057.36/x
  3. Step 3: Cross multiply
    268,045.68x = 402,068.76 × 81,057.36
  4. Step 4: Simplify right side
    268,045.68x = 32,590,632,224.07
  5. Step 5: Solve for x
    x = 32,590,632,224.07/268,045.68
  6. Step 6: Final answer
    x = 121,586.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.